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Polycrase-(Y)

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PDM865879

Polycrase-(Y)

Floater

Description Tabs

Description
Locality: 
Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 1.8 × 1.4 cm
Description

Subparallel aggregate of brown polycrase-(Y) crystals, terminated all around. One side is covered by lustrous crystals of phyllosilicates. Very good undamaged specimen.

Acquired in 1979. Ex Gerard Vogel specimen.

Ex Iván Blanco collection.

Mineral Data
What's on the rock

Polycrase-(Y)

Formula: 
(Y,U)(Ti,Nb)2O6
Strunz: 
4.DG.05
Hardness: 
5.0 - 6.0
Colour: 
Black
Type Locality: 
Rasvåg feldspar quarries, Hidra (Hitterø), Flekkefjord, Vest-Agder, Norway

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